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18 Products for the Brother MFC-7840W MultiFunction Center
You Are Here: >  Top >  Brother >  MFC - All-in-One >  MFC-7840W

BROTHER MFC-7840W DRUM

Brother MFC-7840W Drum Unit - 12,000Pages (MFC7840W Drum)
  OVER 100
IN STOCK NOW

Price:  $27.89
Product Description
Brother MFC-7840W Drum Unit - 12,000Pages (MFC7840W Drum)

This Drum is good for printing 12000 pages, on average. Average page coverage is 5% of toner per page (compared to white space on the paper), which is the standard Brother specification for this drum, and a standard measuring term for the consumer printing industry.


This product comes with a 6 month Warranty against any defects (including free replacement). We stand behind our products 100%, as these are not manufactured by Brother.

What's the difference between a drum and a toner cartridge? A toner cartridge is just that: a cartridge that contains toner. The drum does all the work.


Product Manuals
When do I Replace a Drum Unit in the Brother MFC-7840W Multifunction Printer?
The most important printer component regarding print quality is the drum unit. Herein, you should try to maintain the good working condition of this consumable component by regularly cleaning its primary corona wire. However, once the drum unit reaches the end of its useful life, resp. its printing resource is consumed/exhausted, then even the regular cleaning of the primary corona wire won't help, and the only possible action will be a new drum unit installation. You will be notified by the built-in monitoring system when the installed drum unit needs to be replaced, and this advanced notification will be accomplished by the displaying of the following message ''Drum End Soon'' on the control LCD of your Brother MFC-7840W Multifunction Printer. The displaying of the included above warning message will give you enough time for a new drum unit purchase and installation, in order to be avoided a variety of print quality issues caused by an exhausted drum unit. Another sign for an exhausted or faulty drum unit, which needs to be replaced, is the following message ''Drum Error'' reappearing on the LCD, even after a corona wire cleaning has been performed. You must install a new drum unit in both of the described above situations.
How to Install a Drum Unit in the Brother MFC-7840W Multifunction Printer
Before proceeding with the current replacement procedure, you must be aware that some printer components are getting extremely hot during operation, and because of that, you should strictly follow the instructions given below and avoid touching any printer components which are not listed in the replacement procedure. Also, you must avoid touching the sensitive photoconductive surface of the drum (top side of the drum unit) and the contact area of the toner cartridge, in order to be avoided future print quality problems.

You must start the drum unit replacement in your Brother MFC-7840W Multifunction Printer by opening the front cover. Then, you must grab the handle of the exhausted drum unit and carefully pull towards you, in order to take the exhausted component out of the printer. Now, you must remove the toner cartridge from the exhausted drum unit by pushing down the green lock lever and pulling the cartridge upwards, and then unpack the new drum unit. Immediately after that, you must insert the toner cartridge into the drum unit until it clicks into place, and the green lock lever is automatically elevated/raised. Once the new drum unit and the toner cartridge are assembled, you must locate the green cleaning tab (on the top side of the new drum unit) and slide it to the end of the cleaning channel. After that, you must slide the green cleaning tab back to its original position, and then repeat the previous and the current steps 3-4 times, in order to be optimally cleaned the primary corona wire of the new drum unit. In the next step of the replacement procedure, you must make sure that the green cleaning tab is back to its original position, and then insert the new drum unit along with the attached toner cartridge into the printer. Then, you must reset the drum unit counter by pressing the [Clear/Back] button and confirming the new drum unit installation by pressing the [1] button. Finally, you must wait for the following message ''Accepted'' to appear on the control LCD, and then close the front cover of your Brother MFC-7840W Multifunction Printer.
BROTHER MFC-7840W DRUM & TONER COMBO
Brother MFC-7840W DRUM and TONER COMBO
  OVER 100
IN STOCK NOW

Price:  $40.89
BROTHER MFC-7840W DRUM
Brother MFC-7840W Drum Unit (OEM) made by Brother - Prints 12000 Pages
Brother OVER 50
IN STOCK NOW

Price:  $100.89
BROTHER MFC-7840W TONER CARTRIDGE
Brother MFC-7840W Toner Cartridge (Extra Capacity - 2600 Pages)
  OVER 100
IN STOCK NOW

Price:  $14.89
BROTHER MFC-7840W TONER CARTRIDGES 5PACK
Brother MFC-7840W Toner Cartridges 5Pack - 2,600 Pages Ea.
  OVER 100
IN STOCK NOW

Price:  $70.89
BROTHER MFC-7840W TONER CARTRIDGE
Brother MFC-7840W Toner Cartridge (OEM) made by Brother - 1500 Pages
Brother 36 IN STOCK NOW

Price:  $46.89
BROTHER MFC-7840W TONER CARTRIDGE - HIGH YIELD
Brother MFC-7840W Toner Cartridge (OEM) made by Brother - 2600 Pages
Brother OVER 100
IN STOCK NOW

Price:  $63.89
BROTHER MFC-7840W FUSER ASSEMBLY UNIT
Brother MFC-7840W Fuser Unit (OEM)
Brother

Price:  $138.89
BROTHER MFC-7840W ADF FEED ROLLER
Brother MFC-7840W ADF Feed Roller (OEM)
Brother

Price:  $11.89
MFC-7840W GEAR JOINT
Brother MFC-7840W Dev Gear Joint/53R (OEM)
Brother SHIPS FROM MANUFACTURER
(extra 3-5 days)

Price:  $0.89
BROTHER MFC-7840W SEPARATE ROLLER SHAFT ASSEMBLY
Brother MFC-7840W Separate Roller Shaft Assembly (OEM)
Brother

Price:  $14.89
MFC-7840W SEPARATION RUBBER
Brother MFC-7840W Separation Rubber Assembly (OEM)
Brother

Price:  $10.89
MFC-7840W CASSETTE PAPER FEED KIT
Brother MFC-7840W Cassette Paper Feed Kit (OEM)
Brother

Price:  $16.89
MFC-7840W ROLLER HOLDER ASSEMBLY
Brother MFC-7840W Roller Holder Assembly (OEM)
Brother

Price:  $15.89
MFC-7840W BEARING
Brother MFC-7840W Bearing for Ejection Roller (OEM)
Brother

Price:  $4.89
MFC-7840W MAIN PC BOARD ASSEMBLY
Brother MFC-7840W Main PC Board Assembly (OEM)
Brother

Price:  $147.89
MFC-7840W EJECTION ROLLER ASSEMBLY
Brother MFC-7840W Ejection Roller Assembly (OEM)
Brother

Price:  $8.89
MFC-7840W ADF UNIT ASSEMBLY
Brother MFC-7840W ADF Unit Assembly (OEM) SP
Brother

Price:  $117.89

About My Brother MFC-7840W Multifunction Printer

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